Pump



Sept. 16, 1941. H. CR EWD SON PUME Filed April 8 1938 2 Sheets-Shee t l BY HIS ATTORNEYS A INVENTOR HENRY CREWDSON p 16, 1941- H. CREWDSON PUMP Filed April 8, 1958 2 Shets-Shee-t 2 INVENTOR HENRY CREWDSON BY HIS ATTORNEYS Patented Sept. 16 1941 UNITED V STATES -PATENT OFFICE PUMP v Henry Crewdson, West Chester, Pa., assignor to American Viscose Corporation, Marcus Hook, Pa., a corporation of Delaware Application April 2, 1938, Serial No. 200,995

6 Claims. (01. 103-218) This invention relates to-pumps and it is an object of this invention to provide an improved passage from the supply pipe 2 to the intake port oithepump I.

connections being made to the pump in such manner that theconnection can be made or broken without the connecting or disconnecting Figure 3 is a view in /vertical section taken as .online 3-2 of Figure 1. s

In the drawings the invention is shown inconnection witha pump I oia type suitable for the pumping of viscose solutions to the spinning head used in the forming or rayon threads. The pump l is shown mounted in a support 2 having a base portion 4 and standards 5 and I. the base portion 4 being shaped at its ends to fit about a supply pipe 8 to which it is secured by clamp members In and bolts ii. The standard 5 is drilled throughout itslength providing a bore or passage l4 which is enlarged at both ends: at its lower end to receive a-tubular bushing l5 which proiects from the support 2 to fit into an opening in the supply pipe ii. The upper portion of the bore i4 is enlarged to form a valve chamber and threaded to receive a threaded needle valve l6 and the upper end of the valve chamber is enlarged to receive the packings I! and the packing gland it which serves. to compress the packings H to prevent leakage from the valve chamber.

' of threaded Joints and that the connections can The pump l is shown as comprising a substantially cylindrical casing 2' closed at its ends by the end or cap pieces 32 and 24; respectively, and having rotatably mounted therein a barrel 28 formed with a plurality of plunger bores a and a stem a. The stem 36a projects'through the cap piece 82 and is of reduced diameter at its outer end portion to receive a gear 4| which is fixed on the stem 3 by a set screw 4l.- The bores 38 of the barrel 36 are connected'in turn, as the barrel is rotated, with the intake port in the casing to receive liquid supplied through the bore in the trunnion 24 and with a discharge port in the casing which is connected with'a bore or passage in a second trunnion 42. Plungers 44 slidably mounted in the bores "have substantially spherical heads ll engaged between slippers 41 and 48 slidablyengaslns Plates i and 42, respectively. Spacing rollers 52 mounted in the plates 49 and 50 aid in guiding the slippers 41 and 48. The plates 49 and iii are held inclined to the axis of the plunger-s44 by being mounted on an inclined pin fixed in a support 54 which projects through a slot in the cap piece 34.

The support 54 is formed at its inner end with an enlarged portion 54a having a surface 54b,-

- sphere is held in engagement with the correspondingly shaped outer face of'the cap piece 24. A lock washer 60 between the washer 59 and the head of the bolt 58 prevents loosening of the bolt and a plate 62 mounted on the pin El and held Extending transversely of the standard 5 and intersecting the bore or passage I4 is a second bore or passage which is closed at one end by a threaded plug. 22 and is enlarged at its other end to receive a trunnion 24 which is threaded in an opening in the casing 28 of the pump l. The bore 29 is enlarged beyond the size necessary to receivethe trunnion 24 in order to receive a packing 28 and a packing gland which serves to against rotation thereon prevents wear of the end portion 54a of the support 54. Such wear .as

results from the operation of the pump is dis- 7 tributed on the plates 42 and 60 and the slippers 41 and 48 may be compensated for by adjustment compress the packing 28 .to prevent leakage irom of the pin 5| which is readily accessible through removal of the cap piece 34.

The trunnion 42 is threaded into the pump casing 28 directly opposite the trunnion 24 and is provided with spaced shoulders 42a. and 42b positioned to receive between them a curved seat portion to formed in the upp r end of the inner iork a oi the standard 6. 'A cap piece ii 2 I 2,2so,42s

to the standard byja bolt secures the trunnion 42 in position. The outer end or the trunnion 42 is of spherical shape to iii; an opening in a mounting lug of a filter 12 to which the pipe (not shown) which leads to the spinning head is connected. A bore or passage 12:: in the lug 10 serves to lead the liquid from the passage in the trunnion 42 to the filter and thence to the pipe leading to the spinning head. The mounting lug by a plug 64 slidably mounted in a recess in a plug 86 threaded in the outer iork Ob or the standard 6, a ball 88 being inserted between the plug 64 and the inner end 01' the recess. The

plug 38 is provided with openings 69 to receive a 15 tool for rotating the plug.

Mounting the pump on trunnions and connecting the filter thereto in the manner described permits of the filter being disconnected and the pump being removed from its support for in- 2 spection or repair without the necessity of break- -ing or disconnecting any threaded pipe joints.

Adjustment of plug 66 insures the fllter.being held to the trunnion so as to prevent leakage at the joint and does not place additional pressure on the pump casing as the thrust. of the plug 66 is resisted by the engagement of the collar 420 on the trunnion Q2 against the fork in of the standard 6 and no pressure transmitted to the pump casing to increase the operating 'iriction of the pump. Any slight movement of the trunnion l2 necessary for the collar 42a to engage the fork to is permitted by the slip joint mounting of the trunnion 24 in the standard 5 which allows the trunnion 24 to slide in the packing, 28 and supporting said trunnions, one of said standards gland 30 to insure the pressurebeing resisted by the collar 42a and standard 6 and not by the trunnion 24 and pump casing while, at the same time, providing a leak-proof connection for the flow of liquids from the standard 5 to the pump. 40

What is claimed is:

1. The combination of a pump having a casing, trunnions fixed to said casing and having Dassages for fluid therein, a base having standards supporting said trunnions. means forming a continuation of the passage in one or said trunnions, means mounted on the standard supporting said one trunnion for ,forcibiy holding said first men-' tioned means against the end of said trunnion to establish a passage from said one trunnion to said first mentioned means and means on said one trunnion engaging its supporting standard to prevent transmission of pressure through said trunnion to said pump.

2. The combination of a pump having a casing,

trunnions fixed to said casing, a base having standards supporting said trunnions, one of said trunnions and its supporting standard being at all times arranged for axial movement of said trunnion in either direction with respect to said standard to prevent compressive strains on said casing and the other trunnion and standard having cooperating means preventing all axial movement or said trunnion.

3. The combination of a pump having a casing, trunnions fixed to said casing and having passages for fluid therein, a base having standards III is held in engagement with the trunnion 42 10 supporting said trunnions, one of said standards standard and its cooperating trunnion having a slip-joint connection at all times permitting axial movement of said tnmnion in either direction to prevent compressive strains on said casing and the other standard and its cooperating trunnion having cooperating means preventing axial movement or said trunnion.

4. The combination or a pump having a casin trunnions fixed to said casing and having passages for fiuid therein, a base having standards supporting said trunnions, one of said standards having a passage for fluid therein, said standard and its cooperating trunnion having a slip-joint connection permitting axial movement of said trunnion, means supported by the other of said standards for forcibly holding to the free end 01' theother of said trunnions a. device forming an extension of the passage in said other trunnion and means on said other trunnion engaging its standard to prevent axial movement of said trun- I trunnions fixed to said casing and having passages ior fluid therein, a base having standards being forked, and means in one fork of said a divided standard for forcing against the end of thetrurmion supported by said divided standard a device supported by said means and trunnion and forming acontinuation of the fluid passage of said trunnion and means on said trunnion cooperating with said standard to prevent transmission to the pump casing of the force applied to said trunnion.

6. A mounting for a pump comprising trunnions fixed to the'casing oi the pump and having passages for fluid therein and a base having standards supporting said trunnions, one of the standards having a passage for fluid therein and one of said standards and its cooperating trunniofi having a slip joint connection permitting axial movement of said trunnion in either direction at all times, and the other standard and its cooperating trunnion having cooperating means preventing axial movementoi said trunnion.

HENRY CREWDSON. 

